Welding method and apparatus



March 18 1924. 1,487,043

F. s. YOUTSEY ET AL WELDING METHOD AND APPARATUS Original Filed March 22, 1916 It: 1 v 75 62-) Asmn. /6H 5. Moses W l /2ovo 5. our-65y, J6

Patented Mar. 18, 1924.

1,487,043 PATENT OFFICE.

FLOYD B. YOU'ISEY, OF COLLINBVILLE, ILLINOIS;

ASEELEIGH S. HOSE, OF NEW YORK, N. Y.

MISSOURI, AND

EDWARD G. WALKER, 8'1. LOUIS,

WELDING METHOD AND Arr-snubs.

Original application filed March 22, 1916. Serial No. 85,795. Patent Nth 371,838, dated March 15, 1921.

Divided and this application filed March 10, 1921.

To all whom it may concern:

Be it known that we, EDWARD C. WALKER, and Asnnnmon S. Moses, all citizens of theUnited States, and

t residing at Collinsville, county of Madison,

State of Misof New York, a certain new State of Illinois; St. Louis, souri, and New York, State respectively, have invented and useful Improvement in Welding Meth- 1 ods and Apparatus, of which the following 1 the sheets paratus whereb is a specification.

is invention relates to a method and an apparatus for welding, and more particularly to a method and apparatus for welding by oxygenous welding. This aplication is a division of our Patent Numher 1,371,833, granted March 15, 1921.

Some of the objects of this invention are to develop novel weldi method and a the we ded seam will e uniform, and w ereby damage will be prevented.

Further objects will appear from the detail description taken in connection with the accompanying drawings, in which:

plan of' a part of the ma:

said invention;

Figure 2 is a etail side elevation;

Figure 3 is an enlarged detail of Figure 2,-part of the support being broken away to show the interior construction;

Figure 4 is a section on the line 4-4, Figure 3; and,

Figure 5 is a view similar to Figure} but showing various embodiments 0 this m vention.

The machine to which this invention as shown is applied is fully described in the parent application referred to andcompnses a bracket or support 4, ulpon which is mounted an expansive mandre 6, and this mandrel supports the sheet S of material to weld- As described in said application, the sheet is held against the mandrel by spot- Flgure 1 is a chine embodyin ters 25, and is then wrapped around the mandrel. The seam whic ma be a lapweld is shown in Figure 1. welded by welding mechanlsm now to be described.

A skeleton bracket is mounted on the bracket 4, and this bracket has mounted therein a cross head 51 working in uldes 52 in the bracket 50. The cross hea 51 is fixed to the end of a piston rod 53 having FLOYD S. You're, 54

- tail, since it may be of any well known his seam V is mandrel. The weldin Serial No. 451,281.

a connected piston working in a cylinder mounted on the bracket 50. The cross head 51 has mounted thereon a welding tool 55 of angesuitable construction, this weldmg tool ing preferably of the oxy-acetylene ty e, and mixture being conducted thereto y means of a tubing 56. This tool is slmply illustrated in a general ,way, and no attempt has been made to show it in det e. The tube is rovided with a suitable regiil tmg valve 5 which may regulate the mixture, or concurrently, the flow of the oxy on and acetylene, and this valve is provi ed withan arm carrying a cam roll 58 working in a cam groove 59, in one of the side members 0 the bracket 50. The cam groove has a straight portion 59 which operates to open the valve its maximum amount, and cam portions 60, which operate to set the valve to its minimum fport opening. The right cam groove 60 is ormed in a late 61 slidable on the side member of the bracket, and arranged to be clam ed in adjusted position by screws 62, working in rooves 63. Reciprocation of the piston wil move the tool back and forth along the mandrel, and the cam groove 59, 60 will so ad'ust the gases to the tip as to cause 't is flow, to be reduced at the tool, which ends of the-end of the sheet ward movement of the piston and the connected rods 70. V

In the o eration of forming and welding a he as described in the application referred to the sheet is wrappe around the mandrel to form the seam at the adjoining edges of the sheet along the top face of the torch 55 is moved flame ges of moved along the seam to app y the weldin to the seam and we] the adjoining e the sheet together, this torch being Purpose of this construction will ully described hereinafter.

.flame with respect to by the piston in the cylinder 54. At the conclusion of the welding operation the mandrel is contracted, the spotters 25 retracted, and the piston in the cylinder 74 moves forward to cause the stripping rods to strip the formed and welded keg or receptacle from the mandrel.

In the welding of a scam, the conduction of the heat to the sheet s necessarily greater when midway of the sheet, or away from its ends, than at the ends of the sheet. This is because, in the former case, the conduction is in all directions, while, in the latter, it is through onl 180. If, therefore, the relation of the ame with respect to the scam is constant, the sheet, while at a proper heat at its center, on account of the more rapid loss by radiation, is liable to burn at the ends of the seam on account of the smaller amount of radiation. In accordance with this invention, therefore, the relation of the the seam is controlled by the nature of the seam material adjacent the point impinged by the flame. This can be accomplished in a number of ways, one of which, as shown in Figures 1 and 4, is by the throttling of the gas to reduce the flame as the welding tool approaches the ends of the sheet. In accordance with another method, the duration of the flame contact is controlled and reduced as the flame approaches the ends of the sheet. The first method is shown in Figs. 1 and 4, and has been briefly referred to. In accordance with this construction, by a proper construction of the cam groove 60, the welding temperature of the sheet can be maintained constant. By adjustment of the slide 61, the machine can be adapted to different length ke This adjustment need, however, be on y at one end, since he placed on the mandrel so that the other end abuts against the gage 33 on the beam 26. The cam groove 60 can be so formed that the gas is entirely shut off when the tool reaches its retracted position, a pilot flame being utilized to light the gas automatically.

Figure 5 shows another embodiment of this invention. In accordance with this construction, the cross head 51 has mounted thereon a-bracket 152 which has an arm 153 extending along the tool guide and the cylinder, and which may be supported by a bracket guide 125 on the flange of the cylinder 54. The arm 153 has mounted t ereon a air of cams 126, which are adapted to be a justably clamped thereon by having a slotted connection therewith. The pipe 84 is provided with a check valve which cpens inwar ly, but closes outwardly. Shunting the check valve is a pipe circuit 128 having a valve 129, the arm 130 of which is connected with a link 131 guided in a bracket 132 moved downwardly by a of the cylinder must the sheet can always spring 133 and having a cam roll 134 engagin the arm 153. \Vith this construction, t ierefore, the inlet of the motive uid to the right end of the cylinder 54 is unimpeded, the flow being directly through the pipe 84 past the check valve 127, while the exhaust of the motive fluid from that end be through the branch 128, as the check valve closes the passage directly through the pipe 84. When the valve 129 is fully open, as shown in dotted position, Fi 5, the flow of motive fluid through the branch 128 is unimpeded.

As the tool reciprocates back and forth, the cam roll 134 is moved from full line position to dotted position to open and partially close the valve 129. As the tool proceeds on its initial forward movement, with the cam roll 134 engaging the right cam 126, the movement of the tool will be at a makimum rate: as soon, however, as the cam roll 134 leaves the cam 126, the movement of the tool will be at a minimum rate. The cams 126 are so placed as to result in a move ment of the tool at the maximum rate as the tool starts and leaves the ends of the sheet, but to result in the movement of the tool being a minimum after it is once fully on the sheet. The tool will, therefore, move rapidly on and rapidly off of the sheet, but when fully on the sheet, will move at a uniform slow rate. By the proper proportion of the cams 126 the heating effect on the seam can be made absolutely uniform. As there is no throttling of the pipe 82, and, therefore, no back pressure to the return movement of the tool, the return movement will be rapid, which is necessary, as the seam is welded upon the forwardmovement.

It is obvious that various changes may be made in the details of construction without departing from the spirit of this invention, and it is, therefore, to be understood that this invention is not to be limited to the specific construction shown and described.

Having thus is claimed is:

1. The method of welding a seam, comprising, impinging a welding flame upon the material at the seam, traversing the flame along the flame is maindescribed the invention, what same while such tained at a normal intensity, and automatically reducing the flame below normal intensity when it reaches and impinges the material near the end of the seam! 2. The method of welding a seam, comprising, impinging a welding flame upon the material at the seam, reducing the flame below normal intensity at the beginning of the seam, traversing the seam and automatically increasing the mtensity of the flame to normal, and again automatically reducing the flame below nor- Ill flame along the l mal intensity when it reaches and impinges the material near the end of the seam.

3. A weldin ap lianee comprising a welding tool a apte to direct a flame on a seam, and movable along the seam, and means for controlling the intensity of the flame with respect to the scam in accordance with the position of the tool with respect to the seam.

4. A welding appliance comprising a welding tool adapted to direct a flame on a seam, and movable along the seam, and means for controlling the flame in accordance with the position of the tool with respect to the seam.

5. A welding appliance com rising a welding tool adapfed to direct a ame on a seam, and mova le along the seam, and means for reducing the flame when near the end of the seam.

6. A welding appliance comprising a welding tooladapted to direct a flame on a seam, means for moving the tool along the seam, and means for automatically varying the flame during the movement of the tool.

7. A welding appliance comprising a welding tool adapted to direct a flame on a seam, means for moving the tool along the seam, and means for automatically reducing the flame near the ends of the seam.

8. A welding appliance comprising a welding tool adapted to direct a flame on a seam, means for moving the tool along the seam, and means for automatically reducing the flanlie near the ends of the movement of the too In testimony whereof we have hereunto afiixed our signatures.

FLOYD S. YOUTSEY. EDWARD C. WALKER. ASHELEIGH S. MOSES.

Certificate of Correction.

It is horaby certified that Letters Patent No. 1 487,043, ted March 18, 1924, Won the lgglicat ion of Floyd S. Youtsay of bolhnsvi 0, Illinois; Edward C. nlkar, of Louis, Missoun; and Ashaleigh S. Moses, pf New York, N. Y. for m gmprovament. in Welding Methods and Apparatus, were erroneously issu to the Inventors, mid Youtsey, Walker and Moses, whemas said Letters Patent should has been imued'to National Le Company, of St. Law}, Missouri, a'orpomtion of New Jersey, said corporation being assignee of jhe entxm intarest m sand invenhon, as shown by the mcordof assignments in this ofiioe; and. that the said Letters PM should be mad with this correction therein that the name my conform to thomm'dofthecaaainthePaientOfioe.

fiignad and salad. this 20th day of July,.A. D. 1926.

- J. MOORE,

[ml-1 AM 0mm of Patents. 

